Starting from the impossibly deadpan performance of "Christine Leinonin", who supposedly just lost her son in a massacre, we see that her performance was actually shot in a studio using green-screen to fake the location.
But beyond all that, a little investigation reveals her real name - and the real occupation of her son and-or his stepfather; yet ANOTHER movie business connection to the "shooting"! No wonder Christine feels at home in front of a green screen faking a location interview about her son's "death."
Omar Mateen is an actor, who played the part of the Orlando massacre shooter. His IMDB movie profile was SCRUBBED shortly after this revelation. Some people, however, are likely still are under the impression that this was a real shooting.